Standard Test Method for Determining Relative Humidity in Concrete Floor Using in situ Probes. Apparatus – Humidity Probe and Digital Meter Accuracy ± %. ASTM F ASTM F RH (Relative Humidity). Testing Protocol: ASTM Abstract: Significance and Use. Moisture permeating from concrete floor slabs. 8 Oct ASTM F is an excellent test for determining the actual moisture condition of a slab. As a result, this type of test is recommended by many.
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We recommend placing the serial number decal which also helps track certification of each sensor on the f21770 test hole on the mapped report. If i have an area of approx sq ft and have done the required testing for the area, and 5 fail and 3 atm does the whole area fail? As concrete dries, moisture migrates from the bottom of the slab to the surface where it can evaporate away. October 27, at It has been believed that the change in the desiccant weight could be translated into a moisture ratio for the concrete beneath.
10 Guidelines for ASTM F Compliance
Contact My Account 0 items I would verify that the hole depths are consistent and that environmental conditions are at service conditions. RH Testing and Reporting Drill and prepare the test holes.
There is a potential for condensation to appear on the sensor during the test period, due to the high relative humidity within the concrete until the concrete has sufficiently dried.
When standards are revised, it is a good time to make sure we are up to date and following the procedure to best practice. Each test hole must be drilled to the depth determined at Step 5 above section 10 of ASTM F and properly prepared.
Ff2170 for the reply, Patrick. It is essential that anyone doing the F test follows the standard and allows for that 24 hours to pass before inserting the probe and making final relative humidity measurements.
10 Guidelines for ASTM F2170 Preparation and Testing
Does f210 finish roof product have specifications for testing the concrete deck? F goes on to instruct us to: The basics remain the same, and for good reason. Please login or create an account. The readings will remain high until the sensor is allowed to dry in fresh air.
When To Test Concrete To ASTM F2170?
This is a welcome development as accurate results can be attained in a shorter time. Events News Technical Articles. By testing non-destructively per ASTM F, the inspector can get an instant and precise evaluation of the moisture conditions within 1. Concrete absorbs water vapor from the air under high ambient humidity; concrete releases more water vapor when the humidity of the surrounding air is low. At this point, if one test fails, they all fail.
These first five steps are all preparatory and should be done before any sensors or RH probes are installed. Preparation Confirm your test method equipment meets specifications.
atm And moisture can still be an issue at grade so concrete foundations must be designed to include proper moisture drainage. Added 08 Aug Author: While any professional must understand the exact requirements of standard F the most recent versionthe following are 10 guidelines to help ensure that you have met the criteria laid out in ASTM F For flooring and concrete professionals, ASTM F provides the standard for using relative humidity RH testing when measuring moisture content in concrete slabs.
When To Test Concrete To ASTM F?
Relative humidity RH in a concrete slab can fluctuate with environmental changes. Know the required depth of the test holes.
ASTM F formally recognizes the use of in situ probes as a means of conducting relative humidity testing. In-situ concrete moisture testing places sensors, or probes, inside the slab itself.
This will NOT be valid for ASTM compliance, but can certainly provide a target timeline for schedule decisions or for choosing alternate adhesive or flooring options that might have higher moisture tolerances.
October 31, at June 9, at 1: The MVER is defined as the rate of water vapor emissions from the surface of concrete and is determined with the use of a desiccant material sealed to the slab surface for a specified time period, then measured.
Meeting this standard provides the groundwork for limiting moisture-related flooring problems and the many liabilities and mitigation problems that can result from excess moisture.
Hedenblad states that the waiting time is to overcome the effects of drilling the concrete has on the conditions within the hole created for the test. Customer Service Contact Us Returns. After the initial reading, readings can be updated at any time desired with two conditions in mind: April 7, at 3: Events News Technical Articles.
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